static bool haveHGSMIModeHintAndCursorReportingInterface(VBOXPtr pVBox)
{
uint32_t fModeHintReporting, fCursorReporting;
return RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_MODE_HINT_REPORTING, &fModeHintReporting))
&& RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_GUEST_CURSOR_REPORTING, &fCursorReporting))
&& fModeHintReporting == VINF_SUCCESS
&& fCursorReporting == VINF_SUCCESS;
}
static bool hostHasScreenBlankingFlag(VBOXPtr pVBox)
{
uint32_t fScreenFlags;
return RT_SUCCESS(VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_SCREEN_FLAGS, &fScreenFlags))
&& fScreenFlags & VBVA_SCREEN_F_BLANK;
}
/**
* Get the information needed to map the area used by the host to send back
* requests.
*
* @param pCtx the context containing the heap to use
* @param cbVRAM how much video RAM is allocated to the device
* @param offVRAMBaseMapping the offset of the basic communication structures
* into the guest's VRAM
* @param poffVRAMHostArea where to store the offset into VRAM of the host
* heap area
* @param pcbHostArea where to store the size of the host heap area
*/
RTDECL(void) VBoxHGSMIGetHostAreaMapping(PHGSMIGUESTCOMMANDCONTEXT pCtx,
uint32_t cbVRAM,
uint32_t offVRAMBaseMapping,
uint32_t *poffVRAMHostArea,
uint32_t *pcbHostArea)
{
uint32_t offVRAMHostArea = offVRAMBaseMapping, cbHostArea = 0;
AssertPtrReturnVoid(poffVRAMHostArea);
AssertPtrReturnVoid(pcbHostArea);
VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_HOST_HEAP_SIZE, &cbHostArea);
if (cbHostArea != 0)
{
uint32_t cbHostAreaMaxSize = cbVRAM / 4;
/** @todo what is the idea of this? */
if (cbHostAreaMaxSize >= VBVA_ADAPTER_INFORMATION_SIZE)
{
cbHostAreaMaxSize -= VBVA_ADAPTER_INFORMATION_SIZE;
}
if (cbHostArea > cbHostAreaMaxSize)
{
cbHostArea = cbHostAreaMaxSize;
}
/* Round up to 4096 bytes. */
cbHostArea = (cbHostArea + 0xFFF) & ~0xFFF;
offVRAMHostArea = offVRAMBaseMapping - cbHostArea;
}
*pcbHostArea = cbHostArea;
*poffVRAMHostArea = offVRAMHostArea;
LogFunc(("offVRAMHostArea = 0x%08X, cbHostArea = 0x%08X\n",
offVRAMHostArea, cbHostArea));
}
/**
* Gets the count of virtual monitors attached to the guest via an HGSMI
* command
*
* @returns the right count on success or 1 on failure.
* @param pCtx the context containing the heap to use
*/
RTDECL(uint32_t) VBoxHGSMIGetMonitorCount(PHGSMIGUESTCOMMANDCONTEXT pCtx)
{
/* Query the configured number of displays. */
uint32_t cDisplays = 0;
VBoxQueryConfHGSMI(pCtx, VBOX_VBVA_CONF32_MONITOR_COUNT, &cDisplays);
LogFunc(("cDisplays = %d\n", cDisplays));
if (cDisplays == 0 || cDisplays > VBOX_VIDEO_MAX_SCREENS)
/* Host reported some bad value. Continue in the 1 screen mode. */
cDisplays = 1;
return cDisplays;
}
/** Sanity test on first call. We do not worry about concurrency issues. */
static int testQueryConf(PHGSMIGUESTCOMMANDCONTEXT pCtx)
{
static bool cOnce = false;
uint32_t ulValue = 0;
int rc;
if (cOnce)
return VINF_SUCCESS;
cOnce = true;
rc = VBoxQueryConfHGSMI(pCtx, UINT32_MAX, &ulValue);
if (RT_SUCCESS(rc) && ulValue == UINT32_MAX)
return VINF_SUCCESS;
cOnce = false;
if (RT_FAILURE(rc))
return rc;
return VERR_INTERNAL_ERROR;
}